How To Wire A Third Brake Light On A Trailer
Updated 03/23/2011 | Published 03/21/2011 >
Question:
Can the STL79RB be wired as a third brake light? Id like to mount just one of these, horizontally, up high above the rear doors of my trailer to provide visibility when braking.
asked by: David B
Expert Reply:
To get a third brake light on your trailer I would recommend the Optronics Sealed, Streamline LED Trailer Third Brake Light, 1-Function, part # STL80RB. This can be wired to your trailer using the Tow Ready Vehicle to Vehicle Taillight Converter, part # 118158.
To install the tail light converter # 118158 on your trailer you will connect the wires on the input side of the converter, white (ground) to the trailer frame, green wire to green wire on your trailers wiring, and yellow wire to yellow wire on the trailer wiring. On the output side of the converter you will connect the red wire to the red wire on the Optronics third brake light and the remaining green and yellow will NOT need to be connected. Just tape up the ends of the wires separately so they do not ground out to the trailer frame or touch each other.
This will give you a third brake light on your trailer when your vehicle is plugged into the trailer.
I am including a link to a FAQ page on trailer wiring.
Product Page this Question was Asked From
Optronics Streamline LED Trailer Tail Light - Submersible - 3 Function - 11 Diodes - Red Lens
- Trailer Lights
- Tail Lights
- Brake/Tail/Turn
- Oval
- Surface Mount
- Submersible Lights
- LED Light
- 17L x 1-1/2W Inch
- Red
- Optronics
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: towing mirrors
- Shop: Towing Mirrors
- Video: Installation: K-Source Snap & Zap Custom Towing Mirrors on a 2023 Jeep Gladiator
- Shop: K-Source Snap & Zap Custom Towing Mirrors - Snap On - Driver and Passenger Side
- Shop: Empire Faucets RV Kitchen Faucet - Dual Lever Handle - Brushed Nickel
- Article: Trailer Wiring Diagrams
- Q&A: Connecting 5 Wires From a Trailer to a 7-Way Trailer Connector
- Q&A: Wire Colors and Functions of Hopkins 7-Way Molded Trailer Wire Connector
- Shop: Vehicle Tow Bar Wiring
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Trailer Hitch
- Video: How to Choose a Trailer Brake Controller
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Search Results: trailer hitch
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Shop: Power Mountain Tallboy Off-Road Bottle Jack - 8-1/2" to 37-3/4" Lift - 6 Tons
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Shop: Trailer Wiring
- Video: Redarc Tow-Pro Liberty Brake Controller Review RED24FR
- Search Results: trailer tires and wheels
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Article: How to Measure for Trailer Hitch Drop
- Shop: Suspension Enhancement
- Shop: Brake Controller
- Search Results: trailer jack
- Q&A: Which is Better Roadmaster or Blue Ox Tow Bar
- Article: 5 Things to Know About Weight Distribution Hitches


